<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>天气案例</title>
</head>
<script src="../../js/vue.js"></script>
<body>
<div id="root">
    <h2>今天天气很{{info}}</h2>
    <button @click="change">切换天气</button>
</div>
<script>
    const vm = new Vue({
        el: '#root',
        data: {
            isHot: true
        },
        computed: {
            info() {
                return this.isHot ? '炎热' : '凉爽'
            }
        },
        methods: {
            change() {
                this.isHot = !this.isHot;
            }
        }
    })
</script>
</body>
</html>